“We are dynamic to do all required to safeguard a recapitalization of Europe’s banks,” Chancellor Angela Merkel pronounced in Berlin after assembly with President Nicolas Sarkozy of France.

But over earnest closer coordination of mercantile policies for a euro zone, a dual leaders declined to yield specifics on how a recapitalization would work, or how most income they would commit. The continued doubt could dishearten investors who hoped to see a governments take some-more wilful action.

The proclamation came on a same day that a governments of France, Belgium and Luxembourg concluded to nationalize Dexia, Belgium’s biggest bank, infusing it with billions of euros in taxpayer income after it became a initial misadventure of a Greek sovereign debt crisis. Government officials had raced to column adult Dexia before tellurian financial markets non-stop on Monday.

Dexia, that had perceived a bailout in 2008, “is a biggest euro section bank disaster in utterly some time,” pronounced Peter Zeihan, clamp boss of research during Stratfor, a geopolitical risk research association formed in Austin, Tex. “It will force investors and shareholders to take second demeanour during what they suspicion was stable.”

Banks like Dexia have turn a flashpoint for European governments as they try to rein in a region’s debt woes but worsening their possess finances. Mrs. Merkel, Mr. Sarkozy and others have usually recently conceded that European banks might not be as easeful from a charge as initial thought, generally if a emperor debt conditions ensnares incomparable countries.

If that were to happen, other banks in Europe and a United States — as good as a governments themselves — could come underneath serve pressure.

But Europe’s leaders sojourn during contingency on how to grasp their goals, including a best approach to seaside adult bank finances.

France, for example, wants to siphon income from a building bailout mechanism, a European Financial Stability Facility, into a banks, while Germany insists that a comment should be used usually as a final resort, if a banks are not means to lift some-more income on their own.

The International Monetary Fund has estimated that Europe’s banks might need adult to 300 billion euros, or about $400 billion, some-more collateral if a debt crisis widens.

On Sunday, conjunction Mrs. Merkel nor Mr. Sarkozy put onward their possess figure, observant they indispensable to deliberate with other European leaders. But Mrs. Merkel emphasized that European leaders would do “everything necessary” during a array of arriving meetings, including one involving a 27 European Union leaders this week.

The bailout of Dexia comes as both governments are perplexing to compensate down their possess countries’ deficits and debts. In France, some officials have sounded a alarm that too large of a bailout for Dexia could threat a nation’s argent debt rating, a idea a financial minister, Francois Baroin, has been discerning to dismiss.

Belgium is in a some-more formidable situation. Its debt is 97.2 percent of sum domestic product, a third top in a euro zone, after Greece and Italy. Moody’s Investors Service on Friday warned it could hillside Belgium’s rating if support of Dexia carried Belgium’s debt and investors started pulling adult a borrowing costs. Officials contend a bailout of 4 billion euros would not lift a debt most higher.

It was a second bailout in 3 years for Dexia, a lender to European and American cities that got into difficulty in 2008 after a outrageous portfolio of subprime loans it owned went sour. Dexia perceived billions of euros from France and Belgium, and was a biggest European target of loans from a Federal Reserve’s bonus window during a time.

Dexia, that has tellurian credit bearing of about $700 billion, skeleton to emanate a supposed bad bank to residence a uneasy assets, including billions of euros’ value of Greek, Italian, Portuguese and Irish debt. On Sunday night, a governments were still variable over how to separate a bill.

France gave Belgium capitulation to buy adult to 100 percent of Dexia’s Belgian consumer bank, Bloomberg News reported. Dexia’s French metropolitan financing arm would be separate from a organisation and joined with a French state bank Caisse des Dépôts and a banking arm of a French postal service, Banque Postale.

Dexia had roughly recovered from a prior event when a troubles flared anew in new weeks. Indeed, only 3 months ago, Dexia upheld a turn of highlight tests for European banks, nonetheless regulators final week systematic a examination of those tests to comment for a reduce value of supervision debt.

This month, banks fast started pulling behind on lending to Dexia, and Moody’s placed a bank on examination for a downgrade.

Last week, Dexia’s batch cost plunged 42 percent and, as it neared collapse, trade in a shares was halted on Thursday.

Dexia’s fortunes, and those of many European banks, sojourn tethered to what happens to Greece. Germany’s financial minister, Wolfgang Schäuble, pronounced in an talk with a Sunday book of a Frankfurter Allgemeine Zeitung “that we insincere in Jul a turn of debt rebate that was too low” for Greece, implying Greece faced problems forward and even some-more support.

Mrs. Merkel, now increasingly endangered about any run on a banking system, told financial ministers and leaders from a World Bank and a I.M.F. final week in Berlin that Germany upheld a concurrent bank recapitalization program.

Mrs. Merkel does not wish to flue some-more taxpayer income to a banks before they try going to a markets to lift capital. But she concurred in new meetings in Berlin with World Bank and I.M.F. officials that Germany would not reason behind in bolstering a banks if necessary. Failure to do so, she said, would lead to “vastly aloft damage.”